홋카이도 남부 Warm Core Ring의 탄성파 반사법 영상화

( Mikiya Yamashita ),( Kanako Yokota ),( Yoshio Fukao ),( Shuichi Kodaira1 ),( Seiichi Miura1 ),( Katsuro Katsumata ) 한국지구물리·물리탐사학회 2011 지구물리와 물리탐사 Vol.14 No.1

홋카이도 남쪽 태평양 판의 심부 지각 구조를 규명하기 위해 다중채널 탄성파 반사법 탐사가 2009년에 수행되었다. 탐사 측선은 250km 넓이의 WCR을 가로지르며, 쿠로시오 속류에 의해 생성된 난류가 흐르는 지역에 위치한다. 본 논문에서는 다중채널 탄성파 반사법 자료를 사용하여 WCR의 세부 구조를 규명하고자 하였다. 탐사 측선은 2개의 프로파일로 구성되는데, 그 중 하나는 송신원 간격이 200미터이고, 다른 하나는 50미터 간격이다. 밀집된 송신원을 갖는 측선의 기록자료가 성긴 송신원 측선의 기록자료보다 배경 잡음이 훨씬 많은 것을 관찰할 수 있다. 이 잡음의 발생원은 이전 송신원으로부터 발생한 해수면과 해저면, 그리고 지하 불연속면 사이의 음향 다중반향음으로 확인되었다. 음파 속도 정보가 동시에 수행하는 온도 측정으로부터 구해질 수 있다면 중합전 구조보정 기술을 통해 배경잡음에 묻혀 있는 신호를 효과적으로 강조할 수 있음을 알 수 있었다. WCR은 음향학적으로 볼 때 해양쪽으로 급경사(~2°)이고 해변쪽으로 완경사(~1°)인 오목한 반사면들의 집합체라고 할 수 있다. WCR 내부에서 30km 넓이의 반사면들로 둘러싸인 렌즈 형태의 구조를 확인할 수 있었다. A multi-channel seismic reflection (MCS) survey was conducted in 2009 to explore the deep crustal structure of the Pacific Plate south of Hokkaido. The survey line happened to traverse a 250-km-wide Warm Core Ring (WCR), a current eddy that had been generated by the Kuroshio Extension. We attempted to use these MCS data to delineate the WCR fine structure. The survey line consists of two profiles: one with a shot interval of 200mand the other with a shot interval of 50m. Records from the denser shot point line show much higher background noise than the records from the sparser shot point line. We identified the origin of this noise as acoustic reverberations between the sea surface, seafloor and subsurface discontinuities, from previous shots. Results showed that a prestack migration technique could enhance the signal buried in this background noise efficiently, if the sound speed information acquired from concurrent temperature measurements is available. The WCR is acoustically an assemblage of concave reflectors dipping inward, with steeper slopes (~2°) on the ocean side and gentler slopes (~1°) on the coastal side. Within the WCR, we recognised a 30-km-wide lens-shaped structure with reflectors on the perimeter.

HYERS-ULAM-RASSIAS STABILITY OF THE BANACH SPACE VALUED LINEAR DIFFERENTIAL EQUATIONS y′ = λy

Miura, Takeshi Miura,Jung, Soon-Mo,Takahasi, Sin-Ei Korean Mathematical Society 2004 대한수학회지 Vol.41 No.6

The aim of this paper is to prove the stability in the sense of Hyers-Ulam- Rassias of the Banach space valued differentialequation y' = λy, where λ is a complex constant. That is, suppose f is a Banach space valued strongly differentiable function on an open interval. If f is an approximate solution of the equation y' = λy, then there exists an exact solution of the equation near to f.

SIZ1-mediated sumoylation of ICE1 controls CBF3/DREB1A expression and freezing tolerance in Arabidopsis.

Miura, Kenji,Jin, Jing Bo,Lee, Jiyoung,Yoo, Chan Yul,Stirm, Vicki,Miura, Tomoko,Ashworth, Edward N,Bressan, Ray A,Yun, Dae-Jin,Hasegawa, Paul M Americ 2007 The Plant cell Vol.19 No.4

<P>SIZ1 is a SUMO E3 ligase that facilitates conjugation of SUMO to protein substrates. siz1-2 and siz1-3 T-DNA insertion alleles that caused freezing and chilling sensitivities were complemented genetically by expressing SIZ1, indicating that the SIZ1 is a controller of low temperature adaptation in plants. Cold-induced expression of CBF/DREB1, particularly of CBF3/DREB1A, and of the regulon genes was repressed by siz1. siz1 did not affect expression of ICE1, which encodes a MYC transcription factor that is a controller of CBF3/DREB1A. A K393R substitution in ICE1 [ICE1(K393R)] blocked SIZ1-mediated sumoylation in vitro and in protoplasts identifying the K393 residue as the principal site of SUMO conjugation. SIZ1-dependent sumoylation of ICE1 in protoplasts was moderately induced by cold. Sumoylation of recombinant ICE1 reduced polyubiquitination of the protein in vitro. ICE1(K393R) expression in wild-type plants repressed cold-induced CBF3/DREB1A expression and increased freezing sensitivity. Furthermore, expression of ICE1(K393R) induced transcript accumulation of MYB15, which encodes a MYB transcription factor that is a negative regulator of CBF/DREB1. SIZ1-dependent sumoylation of ICE1 may activate and/or stabilize the protein, facilitating expression of CBF3/DREB1A and repression of MYB15, leading to low temperature tolerance.</P>

A New PIM Joining Process

Miura, Hideshi The Korean Powder Metallurgy Institute 2002 한국분말재료학회지 (KPMI) Vol.9 No.4

A new PIM in-process joining technique has been developed for more complicated and functional PIM components by application of the exuded wax from the green compacts during solvent debinding step. At first, various stainless steels and iron compacts with rectangular shape were combined, and the joining behaviors and properties were investigated by shear and tensile test, and microscopic observation. Subsequently, perfect joined three pieces of thin and hollow compacts were obtained for the combination of same and different stainless steels, and it was difficult to join the iron and stainless steel compacts in hydrogen atmosphere because of the different starting temperature of shrinkage. However, pretty good joined iron and stainless steel compacts were obtained by consideration of particle size and vacuum atmosphere. Finally, for the combination of ferro-silicon and austenitic stainless steel compacts, high functionality (magnetic (1.60Tes1a) & non-magnetic) and perfect joint were obtained.

The American Revolution Considered as an Economic Movement

Miura, Susumu 한국아메리카학회 1976 美國學論集 Vol.9 No.-

DEVELOPMENT OF POSITION-SENSITIVE PROTON RECOIL TELESCOPE (PSPRT)

Miura, Takako,Baba, Mamoru,Kawata, Naoki,Sanami, Toshiya 대한방사선 방어학회 2001 방사선방어학회지 Vol.26 No.3

We have developed a position-sensitive proton recoil telescope(PSPRT) which employs a position-sensitive photomultiplier (PS-PMT) and a scintillator for both a radiator and a proton-detector. This system is expected to achieve high energy resolution under a large solid angle, because it enables to obtain the information not only on the proton energy but also the recoil angle from the position data for both detectors. The response of the PSPRT for 14.1 MeV mono-energetic neutrons was measured, and the PSPRT proved to be operating as expected.

The Arabidopsis SUMO E3 Iigase SIZ1 controls phosphate deficiency responses

Miura, Kenji,Rus, Ana,Sharkhuu, Altanbadralt,Yokoi, Shuji,Karthikeyan, Athikkattuvalasu S.,Raghothama, Kashchandra G.,Bae k, Dongwon,Koo, Yoon-Duck,Jin, Jing-Bo,Bressan, Ray A.,Yun, Dae-Jin,Hasegawa, Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.

Plants sense phosphate (Pi) deficiency and initiate signaling that controls adaptive responses necessary for Pi acquisition. Herein, evidence establishes that AtSIZ1 is a plant small ubiquitin-like modifier (SUMO) E3 ligase and is a focal controller of Pi starvation-dependent responses. T-DNA insertional mutated alleles of AtSIZ1(At5g60410) cause Arabidopsis to exhibit exaggerated prototypical Pi starvation responses, including cessation of primary root growth, extensive lateral root and root hair development, increase in root/shoot mass ratio, and greater anthocyanin accumulation, even though intracellular Pi levels in siz1 plants were similar to wild type. AtSIZ1 has SUMO E3 ligase activity in vitro, and immunoblot analysis revealed that the protein sumoylation profile is impaired in siz1 plants. AtSIZ1-GFP was localized to nuclear foci. Steady-state transcript abundances of Pi starvation-responsive genes AtPT2, AtPS2, and AtPS3 were moderate but clearly greater in siz1 seedlings that in wild type, where Pi is sufficient. Pi starvation induced the expression of these genes to the same extent in siz1 and wild-type seedlings. However, two other Pi starvation-responsive genes, AtlPS1 and AtRNS1, are induced more slowly in siz1 seedlings by Pi limitation. PHR1, a MYB transcriptional activator of AtIPS1 and AtRNS1, is as AtRNS1 sumoylation target. These results indicate that AtSIZ1 is a SUMO E3 ligase and that sumoylation is a control mechanism that acts both negatively and positively on different Pi deficiency responses.

The Arabidopsis SUMO E3 ligase SIZ1 controls phosphate deficiency responses.

Miura, Kenji,Rus, Ana,Sharkhuu, Altanbadralt,Yokoi, Shuji,Karthikeyan, Athikkattuvalasu S,Raghothama, Kashchandra G,Baek, Dongwon,Koo, Yoon Duck,Jin, Jing Bo,Bressan, Ray A,Yun, Dae-Jin,Hasegawa, Paul National Academy of Sciences 2005 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.102 No.21

<P>Plants sense phosphate (Pi) deficiency and initiate signaling that controls adaptive responses necessary for Pi acquisition. Herein, evidence establishes that AtSIZ1 is a plant small ubiquitin-like modifier (SUMO) E3 ligase and is a focal controller of Pi starvation-dependent responses. T-DNA insertional mutated alleles of AtSIZ1 (At5g60410) cause Arabidopsis to exhibit exaggerated prototypical Pi starvation responses, including cessation of primary root growth, extensive lateral root and root hair development, increase in root/shoot mass ratio, and greater anthocyanin accumulation, even though intracellular Pi levels in siz1 plants were similar to wild type. AtSIZ1 has SUMO E3 ligase activity in vitro, and immunoblot analysis revealed that the protein sumoylation profile is impaired in siz1 plants. AtSIZ1-GFP was localized to nuclear foci. Steadystate transcript abundances of Pi starvation-responsive genes AtPT2, AtPS2, and AtPS3 were moderate but clearly greater in siz1 seedlings than in wild type, where Pi is sufficient. Pi starvation induced the expression of these genes to the same extent in siz1 and wild-type seedlings. However, two other Pi starvation-responsive genes, AtIPS1 and AtRNS1, are induced more slowly in siz1 seedlings by Pi limitation. PHR1, a MYB transcriptional activator of AtIPS1 and AtRNS1, is an AtSIZ1 sumoylation target. These results indicate that AtSIZ1 is a SUMO E3 ligase and that sumoylation is a control mechanism that acts both negatively and positively on different Pi deficiency responses.</P>

Relationship between Lower Limb Pain Intensity and Dynamic Lumbopelvic-Hip Alignment in Patients with Degenerative Lumbar Spinal Canal Stenosis: A Cross-Sectional Study

Miura Takuya,Tominaga Ryoji,Sato Keita,Endo Tatsuya,Iwabuchi Masumi,Ito Toshikazu,Shirado Osamu 대한척추외과학회 2022 Asian Spine Journal Vol.16 No.6

Study Design: This cross-sectional study was conducted in a single hospital.Purpose: To clarify the relationship between lower limb pain intensity and dynamic lumbopelvic-hip alignment in patients with lumbar spinal canal stenosis (LSS), using a three-dimensional (3D) motion analysis system.Overview of Literature: Although it is well known that leg symptoms have a close relationship with posture in patients with LSS, the relationship under dynamic conditions, such as gait, remain unclear.Methods: Thirty patients with LSS scheduled for spine surgery participated in this study. Lower limb pain was assessed using the Visual Analog Scale (VAS), and the patients were divided into two groups based on the mean scores (patients with scores above and below the mean were classified as the high-VAS and low-VAS groups, respectively). The kinematics of the spine, pelvis, and hip joints during gait were then measured using a 3D motion analysis system. Student paired t -tests were used to compare the angles of the spine, pelvis, and hip during gait between the two groups.Results: Compared to those in the low-VAS group, the spine was significantly extended and bent toward the more painful lower limb side, and the pelvis was significantly anteriorly tilted among individuals in the high-VAS group.Conclusions: Patients with LSS experiencing severe pain in their lower limb tend to keep the spine in a more extended position, bend laterally toward the painful side, and have an anteriorly tilted pelvic posture. The dynamic spinal and pelvic alignment was closely related to the intensity of the lower limb pain.

Establishment of Laser Sintering Technique for Titanium Powder

Miura Hideshi,Takemasu Teruie,Uemura Makoto,Otsu Masaaki 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1

This paper investigates the characteristic of single-layered and multi-layered compacts made by selective laser sintering using titanium powder (TILOP45 and TILOP150, Sumitomo Titanium Corp.) There were few defects in smooth surface of laser sintered specimen in vacuum as compared to the laser sintered specimen in argon. Maximum tensile strength of singlelayered compact was about 200MPa. Multi-layered compacts show the density of around 75% and the adhesive bonding was not observed between layers, resulted in 70MPa of maximum bending strength and 50MPa of maximum tensile strength.